(0 18 6)(1 9 2)(3 14 5)(4 20 8)(7 12 10)(11 16 13)(15 19 17)
ALLOWS (11/8)-SEQUENCE
1: (1 9 11)
(0 18 6)(1 16 13 11 2)(3 14 5)(4 20 8)(7 12 10)(9)(15 19 17)
2: (7 12 10)
(0 18 6)(1 16 13 11 2)(3 14 5)(4 20 8)(7)(9)(10)(12)(15 19 17)
3: (4 20 8)
(0 18 6)(1 16 13 11 2)(3 14 5)(4)(7)(8)(9)(10)(12)(15 19 17)(20)
4: (2 13 11)
(0 18 6)(1 16 13)(2)(3 14 5)(4)(7)(8)(9)(10)(11)(12)(15 19 17)(20)